I've been using this Kill A Watt for a while now and it still works great. I've used it on some well-known power consumption devices and it seems to be very accurate. Be sure to enter the correct kilowatt-hour price from your utility. UPDATE 7/3/2016. When using Kill A Watt with the Vornado heater, Kill A Watt would overload and his nest would burn and melt. Needless to say, this no longer works. I called the company about it and all they could tell me (other than that they won't replace it) was not to use it with heaters. It seems to me that of all the appliances you would want to know the cost of ownership for, heating would be at the top of the list. There is no warning about this usage in the documentation. So if you want to test low power and low current devices, this is for you.
Electricity Monitor Voltage Overload Protection
8 Review
π‘ Professional Generator Interlock Kit: Compatible with Square D QO or Homeline 150/200 Amp Panels, 1 3/8" Spacing Between Main and Generator Breaker
7 Review
π Poniie PN1500 Portable Electricity Usage Monitor - Power Consumption Watt Meter Voltage Amp Tester (110V, 1500W)
9 Review
π Fulton 110V Single Phase On/Off Switch with Large Stop Sign Paddle: Ideal for Router Tables, Table Saws, and Small Machinery
6 Review
π‘ High-Quality Advance ICN-4P32-SC Electronic Fluorescent Ballast: Ideal for 4 Lamps, 32W T8, 120/277V
3 Review
β‘οΈ Sunpark LC-12014T (1) FC12T9 32W Circline (1) 2D 38W (1) FC16T9 40W Circline (1) FC9T9 30W Circline Lamp Compact Electronic Fluorescent Ballast with Circline Lamp Plug 120V
7 Review
π‘ Hydrofarm Quantum QT400 Dimmable Ballast for 400W Grow Lights
5 Review
Wireless Electronic Ballast Interface Certified
8 Review